cortis



(No Model.)

I. A. CURTIS.

LAMP.

No. 581,879. Patented May 4,1897.

Snares ATFNT rrrcn FRANK A. CORTIS, OF MERIDEN, CONNECTICUT, ASSIGNOR OFONE-HALF TO DIVIGHT T. CORTIS, OF BOSTON, MASSACHUSETTS.

LAMP.

SPECIFICATION forming part of Letters Patent No. 581,879, dated May 4,1897. Application filed July 11, 1896. Serial No 598,780. (No model.)

To all whom it may concern:

Be it known that I, FRANK A. CORTIS, a citizen of the United States, anda resident of Meriden, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements in Lamps,of which the following is a full, clear, and exact description, wherebyany one skilled in the art can make and use the same.

The object of my invention is to provide a VVelsbach lamp with ayielding support or cushion so arranged in combination with the lamp andburner as to insulate the mantle-supporting portion of the lamp from allshocks and jars, whether vertical or lateral; and to this end myinvention consists in the device hereinafter described, and pointed outin the claims.

Referring to the drawings, Figure l is a view in side elevation of alamp embodying the improvement with parts broken away to showconstruction. Fig. 2 is a View, on an enlarged scale, in section throughthe burner and connected parts. Fig. 3 is a view in crosswise sectionthrough the burner and cushion. Fig. 4: is a detail view showing amodified form of the invention.

In the accompanying drawings the letter at denotes a gas-bracket or thelike; I), the burner-tube, secured to the pipe, as by means of threadedinterengaging parts; 0, an airshutter, so called, which consists of ahollow structure having central openings through which extends theburner-tube, ports through which air is admitted to support combustionbeing provided in the under side of this airshutter. A movable valvecontrols the degree of opening through the ports of the airshutter.

An objection has been found in prior devices of this general class inwhich the burner-tube has been made rigid by reason of the breaking ofthe mantles from shocks due to lateral blows, and in order to preventsuch shocks resulting from lateral blows from being communicated to thefragile mantle of the lamp I make this tube flexible, as by jointing itat about the point where it emerges from the air-shutter, as at b. Thisburnertube may be made flexible in any convenient manner. This upperportion extends within the burner d, which is provided with the usualchimney-gallery e, supporting a chimney f, and directly over the burnerthe fragile ,inantle g of the lamp is suspended.

The device as described provides for a lateral swinging movement of theupper part of the burner, but this movement is controlled by a cushion7t, interposed between the chimney-gallery and the air-shutter. In theform shown this cushion consists of a collar h, which rests upon aflange on the air-sl1utter, a collar 7L2, which underlies the flange ofthe chimney-gallery, and a plural number of springs 1', located betweenthe two collars and of a strength suificient to support the upper partof the burner, the chimney, and the shade, and sufliciently flexible toprevent any jar or shock, whether vertical or lateral, given to thebracket from being communicated to the mantle with sufficient force tofracture it. Guides 2",-secured to one collar and extending throughopenings in the opposite collar, may be provided, if desired, for thepurpose of determining the extent of movements of the parts. Thisconstruction of parts provides a yielding cushion to support the weightand insulate the burner from shocks, and also has the added advantage ofproviding a cushion to prevent breaking the mantle when the bracketreceives a blow sidewise, as often happens when the bracket-arm formspart of a chandelier.

It is obvious that other forms of cushion than that specially describedmay be used without the exercise of more than mechanical skill, andthese other forms are contemplated as part of my invention.

In the form of cushion described the springs are located at about thesame distance from the axial center of the burner as is the outer edgeof the lamp-gallery, and this construction enables the springs tooperate more promptly to restore the lamp to a vertical position, fromwhich a jar may have moved it, than would be the case if the springswere located within a narrow space closely about the burner-tube.

In the modified form of the invention shown in Fig. at of the drawingsthe flexibility between the two sections of the burnertube I: isattained by means of a spiral spring is, secured to and between therespective sections of the tube.

I claim as my invention 1. In combination with a bracket-arm or likesupport for a lamp having a fragile mantle over the flame, the mantlesupport, a flexible metallic burner-tube secured to the lamp-bracket andextending through the airshutter and Within the burner, and a yieldingcushion interposed between the mantlesupport and the bracket, allsubstantially as described.

2. In combination with a support for a lamp having a fragile mantle overthe flame, the mantle-support supported on the burner, the burner, aflexible metallic burner-tube se-. cured to the lamp -support andprojecting through'an air-shutter "into the burner, the air shutter, anda yielding cushion interposed between the mantle-support and thelamp-support, all 'substantially as described.

3. 'In combination with asupport'for a lamp having a fragile mantle overthe flame, the mantle-support located on the burner, theburner, 'aflexible metallic burner-tub'e'se cured to the lamp-support andextending through a shutter'into'the burner, a yielding. cushioninterposed between the 'mantle-s'upport and the. lamp-support, andguides for determining theextent of movement of'th'e parts, allsubstantially as described.

4. In combination vvith asuppor'ttor a'l'amp having a fragilemantle overthe flame, the mantle-support located jon the burner, the burner, aflexiblemetallic burner-tube s'e-. cured to the lam p support andextending through'an'ainshutter into the burner, (the air-shutter,and aplural number of yielding cushions interposed between the air-shutterand the burner; alls'ubstantially as described.

5. ln'combination witha' support for a lamp having a'f'ragile mantleover the flame,'the mantle support located on a burner, the burner, aflexible metallic burner-tube s"e' cured to the lamp-bracket andextending thro uglrtheair-s'hutter and Within the burner,theair-shutter, and'a plural number of yielding cushions'interposedbetween the air-shutter and the burner and near'the outer periphcry ofthelatter, all substantially as described.

6. In combination with a support for a lamp having a fragile mantlesupported over the flame, the mantle-supporh'a flexible metallicburner-tube secured to the lamp-support and extending through theair-shutter and within t the burner,the burner,the air-shutter,a pluralnumber of yielding cushions interposed between the air-shutter and theburner and in line near the periphery of the latter, and guides todetermine the extent of movement of the parts, all substantially asdescribed.

7. In combination with a support for a lamp having a fragile mantle overthe flame, the mantle-support located on the burner, the

burner, a flexible metallic burner-tube secured to the lamp-support andextending through theair-shutterWi-thin the'burner,the air-shutter, aflange on the air-shutter of about the same diameter as the greatestdiameter of the burner, and a plural number of cushions interposedbetween the burner and flange and near the outer peripher or thela-ttenall substantially as described.

8. In combination'with a support fora'lam'p having a fragile mantle overtheflam'e, the mantle-support, a flex'iblej ointedbu'rner tube securedto the lamp-support and extending through the air-shutter and Withinthe'bu'rner,

the air-shutter, the burner, "a'ndthe yieldin g cushioninterpos'ed'between the mantle suipport and the lamp-support, allsubstantially as described.

9. In combination with a supportroiaiam' having a fragile mantle overthe flame, the mantle-support located on the burner, the burner, aflexible jointed tubesecured to the "lamp-support andextending'thro'ugh'the"airshutter and Within the burner, the 'airshutter,

and a yielding cushionfinte'rpo'sed between the 'air 'shut'ter and theburner, all substantiallyas described.

10. In c olnbinationvvithasupport foralamp having a g e mantle over theflame, "the mantle-support located on the burner, the burner, aflexible'join'ted burner-tube secured to the lamp-support and extendingthrough the air-shutter a'nd'within'the'burnen'the airshutter, and aplural number of fyieldin'g cushions interposed between the air-shutterand the burner and nearthep'e'riphery ofthe latter, all substantiallyasd'es'c'ribe'd.

FRANK A. CORT-IS.

Witnesses:

ARTHUR B.-JENK1Ns, J. STERN.

